//- reading expressions -------------------------------------
public ExprNode loadExpression(string path)
{
ExprNode enode = null;
string exprtype = oilcan.getStringValue(path + ".type", "");
switch (exprtype)
{
case "ident-expr":
OILNode idsym = loadSymbolRef(path + ".ref");
enode = new IdentExprNode(idsym);
break;
case "int-const":
int intval = oilcan.getIntValue(path + ".val", 0);
enode = new IntConstant(intval);
break;
case "float-const":
double dblval = oilcan.getFloatValue(path + ".val", 0.0);
enode = new FloatConstant(dblval);
break;
case "arith-expr":
enode = loadArithmeticExpression(path);
break;
case "comp-expr":
enode = loadComparisionExpression(path);
break;
case "assign-expr":
enode = loadAssignmentExpression(path);
break;
default:
break;
}
return(enode);
}